wounded outside the empire state building. 7 killed at a university in oakland, california. 7 dead at a sikh temple in oak creek, wisconsin. 12 killed and dozens more wounded at a movie theatre in aurora, colorado. and then there was this -- >> i pledge allegiance to the flag of the united states of america and to the republic for which it stands -- >> congresswoman gabby giffords leading the democratic national convention in the pledge of allegiance some 20 months after she was shot in the head in arizona. >> liberty and justice for all. >> there was one brief exchange during the second debate about gun violence. >> i also share your belief that weapons that were designed for soldiers in war theaters don't belong on our streets. >> i'm not in favor of new pieces of legislation on guns. and taking guns away or making certain guns illegal. >> but during three hours of debates devoted to domestic matters, the phrase "gun control" was never mentioned, not even by the democratic incumbent. >> how do we balance the rights of gun owners while protecting citizens from mass killings? that'